title: Adverse drug reactions causing admission to a paediatric hospital: a pilot study.
abstract: OBJECTIVE
  It is known that adverse drug reactions (ADRs) cause admission to hospital in adults and children. A recent adult study showed that ADRs are an important and frequent cause of hospital admission. The objective of this study is to develop methodology to ascertain the current burden of ADRs through a prospective analysis of all unplanned admissions to a paediatric hospital.
  
  
  METHODS
  Prospective observational study over a 2-week period.
  
  
  CONCLUSIONS
  There were 19 admissions to the main hospital wards related to an ADR, giving an estimated incidence of 4%, with the ADR directly leading to the admission in 71% of cases. There were no deaths attributable to ADR. 33% of the reactions were possibly avoidable. The drugs most commonly implicated in causing admissions were anti-neoplastic agents. The most common reactions were neutropenia, vomiting and diarrhoea. The health burden of ADRs in the paediatric population is likely to be significant. This pilot study will be used to inform a much larger prospective study providing more detailed evidence of the burden of ill-health from ADRs in children. This larger study will add to a body of research aiming to identify drug-related problems within children to aid paediatric pharmacovigilance.
  
  
  CONCLUSIONS
  This study provides knowledge regarding the methodology to be used for a larger study investigating ADRs in children. The study will allow authors who wish to replicate the study in their own populations (internationally) to avoid some of the pitfalls in planning a large epidemiological study of paediatric ADRs. The study also provides an estimate of the incidence and problem of admissions caused by ADRs in a UK paediatric population.
authors.affiliation: Institute of Child Health, Royal Liverpool Children's Hospital NHS Foundation Trust, University of Liverpool, Liverpool, UK. ruairig@liv.ac.uk
authors.forename: R M
authors.initials: RM
authors.lastname: Gallagher
authors.forename: K A
authors.initials: KA
authors.lastname: Bird
authors.forename: J R
authors.initials: JR
authors.lastname: Mason
authors.forename: M
authors.initials: M
authors.lastname: Peak
authors.forename: P R
authors.initials: PR
authors.lastname: Williamson
authors.forename: A J
authors.initials: AJ
authors.lastname: Nunn
authors.forename: M A
authors.initials: MA
authors.lastname: Turner
authors.forename: M
authors.initials: M
authors.lastname: Pirmohamed
authors.forename: R L
authors.initials: RL
authors.lastname: Smyth
mesh_terms: D016907:Adverse Drug Reaction Reporting Systems; D002648:Child; D016208:Databases, Factual; D064420:Drug-Related Side Effects and Adverse Reactions; D006748:Hospital Departments; D006760:Hospitalization; D006776:Hospitals, Pediatric; D006801:Humans; D015994:Incidence; D010865:Pilot Projects; D011446:Prospective Studies; D006113:United Kingdom